Not quite true. The refineries will blend in the additives in the desired amounts for each company they bottle for. So if you and I were both selling oil under our own brand names I could elect to add just enough of the required additives to achieve minimum standards while you could elect not only to go over say 10% for better protection but you may chose to put in other optional additives that I don't. Sure I can either sell for less or have a greater profit margin but in the end my customers who wish to get the max usage out of their vehicle/lawn mower/tractor don't get the extended life they would have gotten had they purchased your oil. That info comes from a petro chemical engineer I went to high school with. I'll take his word for it. I was visiting with him just yesterday as he's in the area on vacation.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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